I recall this info presented in a couple of ex-G registered L10's that I operated years ago...and it was missing from the FAA AFM.
Likewise with two specific ex-QF B707's that I also flew.
I would suspect the
man, DP Davies had a hand in all this.
The data was very well presented, as I recall, especially in the L10 manual.
Nothing wrong with the FAA mind you...just the Brits did it a bit ah, differently.